CVE-2019-6778: canonical ubuntu_linux Out-of-bounds Write
Vulnerability summary
CVE-2019-6778 is a high (CVSS 7.8) Out-of-bounds Write vulnerability in canonical ubuntu_linux. EPSS estimates a 0.61% chance of exploitation in the next 30 days, higher than 49.2% of scored vulnerabilities.
Not severe (CVSS 7.8, local access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 33 · Related 28Timeline
- 17-03-2019PublishedVulnerability first disclosed.
- 04-08-2024Last modifiedVulnerability information updated.
Description
In QEMU 3.0.0, tcp_emu in slirp/tcp_subr.c has a heap-based buffer overflow.
CVSS metrics
5 scores · 4 sources · 2 versions- OSV · Red hatEcosystem advisory · calculated7.8HighCVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
- OSV · UbuntuEcosystem advisory · calculated7.8HighCVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- OSV · DebianEcosystem advisory · calculated7.8HighCVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS trend
Probability
0.61%
Chance of exploitation in the next 30 days
Percentile
49%
Versus all other CVEs
30-day change
No change 0.00 pp
From 0.61% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.
Redhat5 products
- qemu-img< 10:1.5.3-160.el7_6.3
- qemu-kvm< 10:1.5.3-160.el7_6.3
- qemu-kvm-common< 10:1.5.3-160.el7_6.3
- qemu-kvm-debuginfo< 10:1.5.3-160.el7_6.3
- qemu-kvm-tools< 10:1.5.3-160.el7_6.3
Debian2 products
- qemu< 1:3.1+dfsg-3
- slirp4netns< 0.2.1-1
Opensuse2 products
- leapEOL15.0 | 42.3
- slirp4netns&distro=openSUSE Tumbleweed< 1.1.11-1.2
Canonical1 product
- ubuntu_linuxEOL14.04 | 16.04 | 18.04 | 18.10
Fedoraproject1 product
- fedoraEOL29 | 30
Qemu1 product
- qemu3.0.0
Ubuntu1 product
- qemu< 2.0.0+dfsg-2ubuntu1.45 | < 1:2.5+dfsg-5ubuntu10.36 | < 1:2.11+dfsg-1ubuntu7.12
7 vendors · 13 products
References
27 links- lists.opensuse.org/opensuse-security-announce/2019-02/msg00073.htmlVendor AdvisoryX Refsource SUSEMailing ListThird Party Advisory
- www.openwall.com/lists/oss-security/2019/01/24/5X Refsource MISCMailing ListPatchThird Party Advisory
- lists.gnu.org/archive/html/qemu-devel/2019-01/msg03132.htmlX Refsource MISCREPORTMailing ListPatchThird Party Advisory
- lists.opensuse.org/opensuse-security-announce/2019-03/msg00042.htmlVendor AdvisoryX Refsource SUSEMailing ListThird Party Advisory
